@article{kull_1998, 
  title={Semiotic ecology: different nature in the semiosphere}, 
  volume={26}, 
  DOI={10.12697/sss.1998.26.15}, 
  abstractNote={<jats:p>Semiotic ecology: different nature in the semiosphere</jats:p>}, 
  publisher={University of Tartu}, 
  author={Kull, Kalevi}, 
  year={1998}, 
  month={Dec}
  }